I’m trying to upgrade a ROSbot 2 with an RPi 4 in order to use ROS2. I’ve flashed the RPi with the ROSbot2R image however the wifi connection does not seem to show.
Output of sudo iwlist wlan0 scan:
wlan0 Interface doesn’t support scanning
Output of nmcli dev wifi returns with nothing.
Any ideas or has anyone had success doing this upgrade process before?
Thanks.
Hello @jjm53,
If you replaced the board yourself and used RPi4, it is necessary to add a WiFi card because the WiFi module on RPi 4 is disabled by default in our image and the module will not work when closed in a metal box.
The ROSbot 2R is sold with a USB Wi-Fi card connected inside the robot, the antenna of which is connected to the rear panel of the ROSbot.
I hope this information will help you find a solution to your problem.
Thank you that’s very helpful. The external wifi card works.
Hey… 
As per me… here is few things that was I tried:
Check if the WiFi driver is loaded: Run lsmod | grep brcmfmac to see if the driver for the WiFi chipset is loaded. If it’s not, you might need to manually install or update the driver.
Verify WiFi is enabled
Update system packages
Check hardware compatibility
I hope this will help you! 